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| author | Martin K. Petersen <martin.petersen@oracle.com> | 2021-08-06 07:00:19 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2021-08-12 05:25:43 +0300 |
| commit | 6a20e21ae1e25f73385cc248f53440e78dd3cb94 (patch) | |
| tree | 1b05a2494ae2069df3e3d1f935688b4042767bcd /include/scsi | |
| parent | 2266a2def97ce11ec979b6c58a1b637a16eca7dd (diff) | |
| download | linux-6a20e21ae1e25f73385cc248f53440e78dd3cb94.tar.xz | |
scsi: core: Add helper to return number of logical blocks in a request
Link: https://lore.kernel.org/r/20210806040023.5355-2-martin.petersen@oracle.com
Cc: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'include/scsi')
| -rw-r--r-- | include/scsi/scsi_cmnd.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h index ddc9671b325b..6c5a1c1c6b1e 100644 --- a/include/scsi/scsi_cmnd.h +++ b/include/scsi/scsi_cmnd.h @@ -237,6 +237,13 @@ static inline sector_t scsi_get_lba(struct scsi_cmnd *scmd) return blk_rq_pos(scsi_cmd_to_rq(scmd)) >> shift; } +static inline unsigned int scsi_logical_block_count(struct scsi_cmnd *scmd) +{ + unsigned int shift = ilog2(scmd->device->sector_size) - SECTOR_SHIFT; + + return blk_rq_bytes(scsi_cmd_to_rq(scmd)) >> shift; +} + /* * The operations below are hints that tell the controller driver how * to handle I/Os with DIF or similar types of protection information. |